Malleable│ │ │ │ │ │ Cast Iron│ │ │ │ │ │ │ │ │ │ │ │ 16. Cast Iron │ 1.00│ 1.00│2.00│ 3.00│ 2330│ 35,000 for │ │ │ │ │ │ Chilled │ │ │ │ │ │ Castings │ │ │ │ │ │ 17. Semi-Steel │ 1.75│ 2.80│ .40│ 3.20│ 2300│ 35,000 │ │ │ │ │ │ │ │ │ │ │ │ 18. Gray Cast │ 2.00│ 3.10│ .30│ 3.40│ 2200│ 25,000 Iron │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 19. Soft Gray │ 2.50│ 3.30│ .15│ 3.45│ 2200│ 23,000 Cast Iron│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ───────────────┴───────┴─────────┴────┴──────┴───────────┴─────────── ═══════════════╤═════════════╤══════════╤═════════════════ │Elongation[4]│ Welding │ Principal Uses │ │Properties│ │ │ │ │ │ │ ───────────────┼─────────────┼──────────┼───────────────── 1. Sand Cast │ │ │Further Refining. Pig Iron │ │ │ 2. Machine │ │ │Further Refining. Cast Pig │ │ │ Iron │ │ │ ───────────────┼─────────────┼──────────┼───────────────── 3. Open-Hearth│2½″ │ Good │Bars, pipe, Iron │ │ │ sheet. 4. Wrought │2¼″ │ Fine │Bars, pipe, Iron │ │ │ boiler tubes, │ │ │ stay bolts. 5. Mild Steel │2½″ │ Good │Bars, pipe, wire, │ │ │ sheet, │ │ │ shafting, │ │ │ tubes. 6. Medium │2¼″ │ Good │Bars, plate, Steel │ │ │ structural. 7. Rail Steel │1¾″ │ Fair │Rails, gears. 8. Low Carbon │1¼″ │ Fair │Hammers, cold Tool │ │ │ chisels, saws, Steel │ │ │ springs. 9. Medium │1″ │ Poor │Lathe tools, Carbon │ │ │ chisels, Tool │ │ │ drills, dies, Steel │ │ │ springs. 10.
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